Aeration method of carbon sequestration vacuum mixer and application

Abstract

The application discloses a kind of carbon fixation vacuum stirrer's aeration method and application.The carbon fixation vacuum stirrer's aeration method, open the top sealing device of carbon fixation vacuum stirrer, after feeding raw material, close sealing, then vacuum, then aeration is to positive pressure and control air pressure, to promote gas and raw material mixing, realize carbon fixation effect.The carbon fixation vacuum stirrer's aeration method and application, it is easy to control the injection amount of carbon dioxide and injection start-stop, simple operation, convenient to use, with the flow value of injected gas control gas injection start-stop, with pressure change to assist calculation gas consumption, gas injection is absorbed by material at the same time, the amount of absorbed gas cannot be measured before gas injection stops, so as to affect the calculation of gas consumption, using this calculation method can calculate the consumption of gas in carbon fixation vacuum stirring process, reduce error.

Description

Technical Field

[0001] This invention relates to the field of carbon solidification vacuum mixers, specifically to a method for filling a carbon solidification vacuum mixer and its application. Background Technology

[0002] With the vigorous promotion and popularization of "energy conservation, emission reduction and carbon emission reduction", a large amount of carbon dioxide is generated in the traditional concrete mixing process. In order to absorb carbon dioxide and reduce the use of cement in the concrete mixing process, a corresponding carbon fixation vacuum mixer has been developed. During the mixing process, it is necessary not only to fill the cylinder with carbon dioxide to a positive pressure of 0.3 MPa, but also to control the amount of carbon dioxide injected and the start and stop of the injection, and to calculate the gas consumption during the carbon fixation vacuum mixing process to achieve the carbon fixation effect in the concrete mixing process.

[0003] Chinese patent CN114734533B discloses a concrete mixing device and method for enhancing carbonation. The device includes a main mixing vessel and a pre-mixing vessel. The pre-mixing vessel comprises a cylinder, a material gate mechanism, and a lifting mechanism. Through a specific structural design, the added cement powder undergoes pretreatment in a high-humidity, high-pressure, and high-carbon dioxide environment, generating a large number of calcium carbonate crystal nuclei. This allows for the rapid formation of calcium carbonate crystals within the main mixing vessel, increasing the reaction rate and strengthening the concrete. While this patent addresses carbonation during concrete mixing, its primary focus is on enhancing the carbonation effect through the design of the pre-mixing vessel. It does not provide a method for precisely controlling the amount and start / stop of carbon dioxide injection, nor does it address the calculation of gas consumption.

[0004] Given the functional requirements of carbon fixation vacuum mixers, it is necessary to design a method for precisely controlling the amount of carbon dioxide injected and the start and stop of injection, as well as a method for calculating gas consumption. This will not only improve the environmental performance of concrete, but also enhance its workability and compressive strength. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a method for purging a carbon fixation vacuum mixer and its application, solving the problems of controlling the amount of carbon dioxide injected, starting and stopping the injection, and calculating the gas consumption during the carbon fixation vacuum mixing process in concrete.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for purging a carbon-fixing vacuum mixer, comprising the following steps:

[0007] S1: Open the top sealing device of the carbon solidification vacuum mixer, and put the raw materials to be mixed into the interior of the carbon solidification vacuum mixer through the top opening. After the feeding is completed, control the top sealing device to close and control the vacuum equipment to extract the air pressure inside the carbon solidification vacuum mixer to 0MPa.

[0008] S2: Inflate the carbon solidification vacuum mixer with gas. When gas enters from the first manual ball valve in the upper chamber and the fifth manual ball valve in the lower chamber, close the second, fourth, and seventh manual ball valves.

[0009] S3: Open the first manual ball valve and adjust the intake pressure using the pressure reducing valve and pressure gauge;

[0010] S4: Open the third manual ball valve, the fifth manual ball valve, and the sixth manual ball valve;

[0011] S5: When the pipeline solenoid valve receives the inflation signal, it opens for inflation. The flow meter reads the inflation flow rate. When the inflation flow rate reaches the set value, it sends a shut-off signal back to the pipeline solenoid valve. The pipeline solenoid valve closes and stops inflation. At this time, the internal air pressure of the carbon solidification vacuum mixer is positive, and the internal air pressure value of the carbon solidification vacuum mixer is recorded.

[0012] S6: The gas value absorbed by the reaction can be obtained by subtracting the gas pressure value after stirring from the gas pressure value before stirring. By reverse calculation, the gas pressure value inside the carbon solidification vacuum mixer after stirring can be calculated from the existing gas pressure value before stirring and the value absorbed by the raw material to be stirred.

[0013] S7: Controls the stirring equipment of the carbon solidification vacuum mixer to carry out stirring. During the stirring process, gas seeps into the raw material, causing the internal air pressure of the carbon solidification vacuum mixer to decrease. Stirring stops when the air pressure decreases to the calculated air pressure value.

[0014] S8: Open the pressure relief valve to release the pressure inside the solid carbon vacuum mixer, complete the aeration and mixing of the raw materials, and control the discharge.

[0015] Preferably, two air injection pipes are installed on the front side wall of the carbon solidification vacuum mixer, located at the upper part. A sixth manual ball valve and a seventh manual ball valve are respectively installed at the front end of the two air injection pipes for manually controlling the internal switches of the air injection pipes. A solenoid valve for controlling the internal switches of the pipe and a flow meter for calculating the flow rate are installed on the air injection pipe behind the seventh manual ball valve. A three-way pipe is installed at the front end of the sixth manual ball valve. A pressure gauge, a pressure reducing valve, and a first manual ball valve are sequentially installed at the upward-extending end of the three-way pipe. A second manual ball valve is installed at the three-way pipe in front of the seventh manual ball valve. Near the top of the pipeline, the bottom of the three-way pipe in front of the sixth and seventh manual ball valves are respectively equipped with the third and fourth manual ball valves. The bottom ends of the third and fourth manual ball valves are connected by a three-way merging pipe. The lower end of this three-way merging pipe is equipped with the fifth manual ball valve. The rear end of the fifth manual ball valve is equipped with a bottom meter. The rear end of the bottom meter is connected to the bottom discharge chamber of the carbon solidification vacuum mixer through a pipe. A pressure sensor is installed on the front wall of the carbon solidification vacuum mixer, and the sensing head of the pressure sensor extends into the interior of the carbon solidification vacuum mixer.

[0016] Preferably, the top of the carbon solidification vacuum mixer is provided with a top opening for feeding materials into the carbon solidification vacuum mixer and a top sealing device for sealing the top opening.

[0017] Preferably, the upper end of the first manual ball valve is connected to the carbon dioxide supply pipeline, and the upper end of the second manual ball valve is connected to the nitrogen supply pipeline.

[0018] Preferably, the pressurized stirring environment in S5 is 0.3 MPa.

[0019] Preferably, the calculation method for the gas absorbed in the reaction in S6 is: gas volume * pressure drop * 10 = gas absorption value.

[0020] This invention provides a method for purging a carbon-fixing vacuum mixer and its application. It offers the following advantages:

[0021] 1. After the first ball valve is opened, the pressure reducing valve is turned to adjust the air intake pressure. When the pipeline solenoid valve receives the air filling signal, it starts filling. When the gas injection amount reaches the set value, the pipeline solenoid valve closes and stops filling. This makes it easy to control the amount of carbon dioxide injected and the start and stop of the injection. It is simple to operate and easy to use.

[0022] 2. The gas injection is controlled by the gas flow rate, and the gas consumption is calculated by pressure changes. During gas injection, the gas is absorbed by the material. The amount of absorbed gas cannot be measured before the gas injection stops, which affects the calculation of gas consumption. This calculation method can be used to calculate the gas consumption during solid carbon vacuum stirring and reduce errors. Attached Figure Description

[0023] Figure 1 This is a front structural diagram of the carbon fixation vacuum mixer and the carbon fixation vacuum mixer used in the present invention, which is described in the gas filling method of the carbon fixation vacuum mixer.

[0024] Figure 2 This is a schematic diagram of the right side structure of the carbon solidification vacuum mixer described in this invention, which illustrates the air filling method and application of the carbon solidification vacuum mixer.

[0025] The markings in the attached diagram are described below:

[0026] 1. First manual ball valve; 2. Pressure reducing valve; 3. Pressure gauge; 4. Pipeline solenoid valve; 5. Flow meter; 6. Pressure sensor; 7. Second manual ball valve; 8. Third manual ball valve; 9. Fourth manual ball valve; 10. Fifth manual ball valve; 11. Sixth manual ball valve; 12. Seventh manual ball valve. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0028] Please see Figures 1-2 This invention provides a technical solution: a method for purging a carbon-fixing vacuum mixer, comprising the following steps:

[0029] S1: Open the top sealing device of the carbon solidification vacuum mixer, and put the raw materials to be mixed into the interior of the carbon solidification vacuum mixer through the top opening. After the feeding is completed, control the top sealing device to close and control the vacuum equipment to extract the air pressure inside the carbon solidification vacuum mixer to 0MPa.

[0030] S2: Pressurize the interior of the carbon solidification vacuum mixer. When the gas enters from the first manual ball valve 1 in the upper chamber and the fifth manual ball valve 10 in the lower chamber, close the second manual ball valve 7, the fourth manual ball valve 9, and the seventh manual ball valve 12.

[0031] S3: Open the first manual ball valve 1 and adjust the intake pressure through the pressure reducing valve 2 and pressure gauge 3;

[0032] S4: Open the third manual ball valve 8, the fifth manual ball valve 10, and the sixth manual ball valve 11;

[0033] S5: When the pipeline solenoid valve 4 receives the inflation signal, it opens the inflation valve. The flow meter 5 reads the inflation flow rate. When the inflation flow rate reaches the set value, it sends a shut-off signal back to the pipeline solenoid valve 4. The pipeline solenoid valve 4 closes and stops inflation. At this time, the internal air pressure of the carbon solidification vacuum mixer is positive, and the internal air pressure value of the carbon solidification vacuum mixer is recorded.

[0034] S6: The gas value absorbed by the reaction can be obtained by subtracting the gas pressure value after stirring from the gas pressure value before stirring. By reverse calculation, the gas pressure value inside the carbon solidification vacuum mixer after stirring can be calculated from the existing gas pressure value before stirring and the value absorbed by the raw material to be stirred.

[0035] S7: Controls the stirring equipment of the carbon solidification vacuum mixer to carry out stirring. During the stirring process, gas seeps into the raw material, causing the internal air pressure of the carbon solidification vacuum mixer to decrease. Stirring stops when the air pressure decreases to the calculated air pressure value.

[0036] S8: Open the pressure relief valve to release the pressure inside the solid carbon vacuum mixer, complete the aeration and mixing of the raw materials, and control the discharge.

[0037] In this embodiment, two gas injection pipes are installed on the front side wall of the carbon-fixing vacuum mixer, located at the upper part. A sixth manual ball valve 11 and a seventh manual ball valve 12 for manually controlling the internal switches of the gas injection pipes are respectively installed at the front ends of the two gas injection pipes. A solenoid valve 4 for controlling the internal switches of the pipe and a flow meter 5 for calculating the flow rate are installed on the gas injection pipe behind the seventh manual ball valve 12. A three-way pipe is installed at the front end of the sixth manual ball valve 11. A pressure gauge 3, a pressure reducing valve 2, and a first manual ball valve 1 are sequentially installed at the upward-extending end of the three-way pipe. A second manual ball valve 7 is installed at the front end of the seventh manual ball valve 12. At the top of the three-way pipe, the bottom of the three-way pipe in front of the sixth manual ball valve 11 and the seventh manual ball valve 12 is respectively equipped with the third manual ball valve 8 and the fourth manual ball valve 9. The bottom ends of the third manual ball valve 8 and the fourth manual ball valve 9 are connected by a three-way merging pipe. The lower end of the three-way merging pipe is equipped with the fifth manual ball valve 10. The rear end of the fifth manual ball valve 10 is equipped with a bottom meter. The rear end of the bottom meter is connected to the bottom discharge chamber of the solid carbon vacuum mixer through a pipe. The front side wall of the solid carbon vacuum mixer 1 is equipped with a pressure sensor 6. The sensing head of the pressure sensor 6 extends into the interior of the solid carbon vacuum mixer.

[0038] Specifically, refer to the instruction manual. Figure 1-2 As shown, during inflation, when gas enters through the first manual ball valve 1 in the upper cavity and the fifth manual ball valve 10 in the lower cavity, the second manual ball valve 7, the fourth manual ball valve 9, and the seventh manual ball valve 12 are closed, and the first manual ball valve 1 is opened. The intake pressure is adjusted by the pressure reducing valve 2 and the pressure gauge 3. Then, the third manual ball valve 8, the fifth manual ball valve 10, and the sixth manual ball valve 11 are opened. When the pipeline solenoid valve 4 receives the inflation signal, it opens for inflation. The flow meter 5 reads the inflation flow rate. When the inflation flow rate reaches the set value, a shutdown signal is fed back to the pipeline solenoid valve 4, which closes, stops inflation, and completes the inflation process.

[0039] In this embodiment, the top of the carbon solidification vacuum mixer is provided with a top opening for feeding materials into the carbon solidification vacuum mixer and a top sealing device for sealing the top opening.

[0040] Specifically, raw materials are added to the interior of the carbon solidification vacuum mixer through the top opening. After the material is added, the top sealing device is controlled to seal the top of the carbon solidification vacuum mixer.

[0041] In this embodiment, the upper end of the first manual ball valve 1 is connected to the carbon dioxide supply pipeline, and the upper end of the second manual ball valve 7 is connected to the nitrogen supply pipeline.

[0042] Specifically, carbon dioxide is injected into the carbon solidification vacuum mixer through the first manual ball valve 1, and nitrogen is injected into the carbon solidification vacuum mixer through the second manual ball valve 7.

[0043] In this embodiment, the pressurized mixing environment in S5 is 0.3 MPa, which is used to enable the concrete to effectively absorb carbon dioxide and achieve carbon fixation.

[0044] Specifically, the calculation method for the gas absorbed in the reaction in S6 is: gas volume * pressure drop * 10 = gas absorbed in the reaction.

[0045] In this embodiment, the total volume of the cavity is 652L, the feed volume is 35L, and the gas is 617L of carbon dioxide (652-35=617L). The initial pressure inside the cavity is 0MPa. After feeding and stirring, 617L of carbon dioxide is purged in flow mode. Theoretically, the pressure after purging is 0.1MPa. For example, after stirring for 2 minutes, the pressure drops to 0.058MPa. Then, the carbon dioxide consumed is 0.1-0.058=0.042MPa, which is converted to a flow rate of 617*0.042*10=259.14L. This calculation method uses the initial pressure after purging to subtract the pressure after reaction absorption to obtain the pressure reduction during the reaction absorption process. Then, the pressure value is converted into a flow rate value to calculate the gas consumption during the reaction absorption process.

[0046] Working principle of gas-filled mixing: Open the top sealing device of the carbon solidification vacuum mixer, and put the raw materials to be mixed into the interior of the carbon solidification vacuum mixer through the top opening. After the feeding is completed, control the top sealing device to close, and control the vacuum equipment to extract the gas pressure inside the carbon solidification vacuum mixer to 0MPa. Then connect the carbon dioxide supply pipeline to the first manual ball valve 1. When gas enters from the first manual ball valve 1 in the upper chamber and the fifth manual ball valve 10 in the lower chamber, close the second manual ball valve 7, the fourth manual ball valve 9, and the seventh manual ball valve 12, and open the first manual ball valve 1. Adjust the inlet pressure through the pressure reducing valve 2 and the pressure gauge 3, and then open the third manual ball valve 8, the fifth manual ball valve 10, and the sixth manual ball valve 11. When the pipeline solenoid valve 4 receives the gas filling signal, it opens for gas filling. The flow meter 5 reads the gas filling flow rate. When the gas filling flow rate reaches... When the set value is reached, a shut-off signal is fed back to pipeline solenoid valve 4, which closes, stopping the gas filling. At this time, the internal pressure of the carbon solidification vacuum mixer is positive, and the internal pressure value of the carbon solidification vacuum mixer is recorded. The amount of gas absorbed by the reaction can be calculated by subtracting the gas pressure value after stirring from the gas pressure value before stirring. Through reverse calculation, the internal pressure value of the carbon solidification vacuum mixer after stirring can be calculated from the existing gas pressure value before stirring and the amount absorbed by the raw material to be stirred. The stirring equipment of the carbon solidification vacuum mixer is controlled to carry out stirring. During the stirring process, gas seeps into the raw material, causing the internal pressure of the carbon solidification vacuum mixer to decrease. When the gas pressure decreases to the calculated gas pressure value, stirring stops, the pressure relief valve is opened, and the internal pressure of the carbon solidification vacuum mixer is released, completing the gas filling and stirring work of the raw material, and controlling the discharge.

[0047] Calculation Principle: The total volume of the chamber is 652L. 35L of material is added, and 617L of carbon dioxide is added (652-35=617L). After vacuuming, the initial internal pressure of the chamber is 0MPa. After adding and stirring, 617L of carbon dioxide is added in flow mode. Theoretically, the pressure after addition is 0.1MPa. For example, after stirring for 2 minutes, the pressure drops to 0.058MPa. Therefore, the carbon dioxide consumed is 0.1-0.058=0.042MPa, which translates to a flow rate of 617*0.042*10=259.14L. This calculation method uses the initial pressure after addition to subtract the pressure after absorption during the reaction to obtain the pressure reduction during the absorption process. This pressure value is then converted to a flow rate value to calculate the gas consumption during the absorption process.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for purging a carbon-fixing vacuum mixer, characterized in that, Includes the following steps: S1: Open the top sealing device of the carbon solidification vacuum mixer, and put the raw materials to be mixed into the interior of the carbon solidification vacuum mixer through the top opening. After the feeding is completed, control the top sealing device to close and control the vacuum equipment to extract the air pressure inside the carbon solidification vacuum mixer to 0 MPa. S2: Inflate the solid carbon vacuum mixer with gas. When the gas enters from the first manual ball valve (1) in the upper chamber and the fifth manual ball valve (10) in the lower chamber, close the second manual ball valve (7), the fourth manual ball valve (9), and the seventh manual ball valve (12). S3: Open the first manual ball valve (1) and adjust the intake pressure through the pressure reducing valve (2) and pressure gauge (3); S4: Open the third manual ball valve (8), the fifth manual ball valve (10), and the sixth manual ball valve (11). S5: When the pipeline solenoid valve (4) receives the inflation signal, it opens the inflation valve and the flow meter (5) reads the inflation flow rate. When the inflation flow rate reaches the set value, it feeds back the shut-off signal to the pipeline solenoid valve (4), and the pipeline solenoid valve (4) closes and stops the inflation. At this time, the internal pressure of the solid carbon vacuum mixer is positive, and the internal pressure value of the solid carbon vacuum mixer is recorded. S6: The gas value absorbed by the reaction is calculated by subtracting the gas pressure value after stirring from the gas pressure value before stirring. The gas pressure value inside the carbon solidification vacuum mixer after stirring is calculated by reverse calculation from the existing gas pressure value before stirring and the value absorbed by the raw material to be stirred. S7: Controls the stirring equipment of the carbon solidification vacuum mixer to carry out stirring. During the stirring process, gas seeps into the interior of the raw material, causing the internal air pressure of the carbon solidification vacuum mixer to decrease. Stirring stops when the air pressure decreases to the calculated air pressure value. S8: Open the pressure relief valve to release the pressure inside the solid carbon vacuum mixer, complete the gasification and mixing of the raw materials, and control the discharge. Two gas injection pipes are installed on the front side wall of the carbon solidification vacuum mixer, located at the upper part. The front ends of the two gas injection pipes are respectively equipped with a sixth manual ball valve (11) and a seventh manual ball valve (12) for manually controlling the internal switch of the gas injection pipe. The gas injection pipe behind the seventh manual ball valve (12) is equipped with a pipe solenoid valve (4) for controlling the internal switch of the pipe and a flow meter (5) for calculating the flow rate. The front end of the sixth manual ball valve (11) is equipped with a three-way pipe. The upward extension end of the three-way pipe is equipped with a pressure gauge (3), a pressure reducing valve (2) and a first manual ball valve (1) in sequence. The second manual ball valve (7) is installed on the three-way pipe at the front end of the seventh manual ball valve (12). At the top of the pipeline, the bottom of the three-way pipe in front of the sixth manual ball valve (11) and the seventh manual ball valve (12) is respectively equipped with the third manual ball valve (8) and the fourth manual ball valve (9). The bottom of the third manual ball valve (8) and the fourth manual ball valve (9) are connected by a three-way merging pipe. The bottom of the three-way merging pipe is equipped with the fifth manual ball valve (10). The rear end of the fifth manual ball valve (10) is equipped with a bottom meter. The rear end of the bottom meter is connected to the bottom discharge chamber of the solid carbon vacuum mixer through a pipe. The front wall of the solid carbon vacuum mixer (1) is equipped with a pressure sensor (6). The sensing head of the pressure sensor (6) extends into the interior of the solid carbon vacuum mixer. The upper end of the first manual ball valve 1 is connected to the carbon dioxide supply pipeline, and the upper end of the second manual ball valve (7) is connected to the nitrogen supply pipeline.

2. The gas-filling method for a carbon-fixing vacuum mixer according to claim 1, characterized in that: The top of the carbon solidification vacuum mixer is provided with a top opening for feeding materials into the carbon solidification vacuum mixer and a top sealing device for sealing the top opening.

3. The gas-filling method for a carbon-fixing vacuum mixer according to claim 1, characterized in that: The pressurized stirring environment in S5 is 0.3 MPa.

4. The gas-filling method for a carbon-fixing vacuum mixer according to claim 1, characterized in that: The calculation method for the gas absorbed in the reaction in S6 is: gas volume * pressure drop * 10 = gas absorption value.

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